Pet products fulfillment
How to Ship Heavy and Bulky Pet Items: Dimensional Weight, and LTL vs FTL
Updated October 2026
A big bag of kibble, a tall cat tree and a glass aquarium don't all ship the same way. Each heavy order goes parcel, LTL or FTL by its size and weight, and the awkward ones are packed for their shape.
Heavy and bulky pet orders ship one of three ways:
- parcel, for a single oversize item
- LTL on pallets, for several heavy units or a restock
- FTL, once there is enough to fill a trailer
We choose among them by each order's size, weight and freight class. Awkward items like cat trees and aquariums are braced and padded for their shape before we hand them to the carrier.
By The Fulfillment.com team
Why size matters
Why heavy and bulky pet items don't always ship parcel
Most pet products go out by parcel without anyone thinking twice. The heavy, bulky ones are different, because of dimensional weight. A parcel carrier works out a weight from the box's size, using its published divisor, and bills that or the scale weight, whichever is higher. So a bulky item pays for the room it takes up even when it isn't especially heavy. Past a certain size and weight, a single oversize item costs too much as a parcel and is better sent as freight.
Where that point falls is different for each order. Litter and kibble, the two products that take up the most room, have their own guide on box sizes: cat litter and kibble freight optimization. What dimensional weight adds to a whole shipping bill is covered in pet product fulfillment cost.
Ways to ship
Parcel, LTL or FTL
Each of the three ways to ship suits a different kind of heavy order, and one catalog will use all three in a normal week.
Parcel, for a single oversize item. One bag of kibble, one pet bed or one mid-size crate going to one buyer still ships as a parcel. The box is sized to the item first, so the carrier isn't paid to move empty space. Parcel works while the order is one item inside the carriers' oversize and maximum size and weight limits. An item past those limits, or an order of several heavy units, starts picking up surcharges and extra handling fees. At that point freight usually costs less.
LTL (less-than-truckload), for pallets of heavy goods. Some orders and restocks are several heavy units. Others are one item too big or awkward for parcel, like a large cat tree, a full kennel or an aquarium. Those go on a pallet and ship LTL. The price then depends on freight class and pallet count, not on each box's dimensional weight, and for a truly heavy load that is almost always cheaper per unit. LTL does cost you something. It takes a day or two longer than parcel, and it can add charges for a liftgate, a home delivery or a booked delivery time. So it is chosen order by order, not switched on for everything. We arrange it through our freight and LTL/FTL routing service.
FTL (full-truckload), for a trailer's worth. A wholesale or retail restock, a store delivery of many pallets or a large bulk move can fill a trailer, or nearly. A full truck drives straight to the destination. It skips the LTL terminals and the freight-class markup, which usually makes it the cheapest per unit. With only a few pallets, though, you'd be paying for a mostly empty truck, and LTL is the better choice.
The people who pick and pack an order at our warehouse also arrange its freight, so choosing how it ships and packing it are never two hand-offs apart.
Awkward shapes
Cat trees, crates, beds and tanks
Dense, regular items like a bag of kibble or a jug of litter are mostly a question of box size and shipping rate, and cat litter and kibble freight optimization goes through both. Big, odd-shaped durables built to last are another matter. They aren't dense. They're awkward, and what goes wrong with them is damage on the way, not only a charge for size.
Each shape needs its own packing:
- Cat trees and scratching posts are tall and top-heavy, and their corners crush easily. They go LTL rather than parcel, braced and with corner protection.
- Crates, kennels and carriers are bulky and ship FTL or LTL. Bracing keeps the frame from twisting out of shape on the way.
- Pet beds are light and take up a lot of room, so they are billed almost entirely on size. Compressing them, or packing them in a box that fits, keeps them out of a freight price their weight doesn't call for.
- Aquarium tanks and filters are heavy and breakable at once. They ship cushioned, with the glass kept clear of the heavy parts.
How we handle it
Shipping choice and packing, decided together
On a heavy order, we settle how it ships and how it's packed at the same time. As each order is packed, we size it against its dimensions, weight and freight class and assign it to parcel, LTL or FTL. Awkward items are braced and padded before they leave our dock. Every pack is scanned against the order line, so the right item goes out. Orders that come in before the cut-off are worked the same day.
Distance adds to the cost too, whichever way an order ships. Multi-node inventory placement for pet brands looks at keeping stock in more than one of the warehouses in our national fulfillment network.
Questions about shipping heavy pet products
When should heavy pet items ship LTL instead of parcel?
Two kinds of order usually belong on LTL. One is an order of several heavy units. The other is a single item too big or too awkward for the parcel carriers' size and weight limits, such as a large cat tree, a full kennel or an aquarium. On a pallet, the shipment is priced by freight class and pallet count rather than by each parcel's dimensional weight. Once the load is truly heavy, that usually works out cheaper per unit. In exchange, delivery takes a day or two longer and extra delivery charges may apply.
When is FTL worth it over LTL for pet products?
When you have enough to fill a trailer, or close to it. A wholesale or retail restock and a store delivery of many pallets are the usual cases. A full truck goes straight to its destination without stopping at LTL terminals, and it carries no freight-class markup, so it usually costs the least per unit. For a few pallets it is far more truck than you need, and LTL is the better fit.
What is dimensional weight, and why does it matter for heavy pet items?
Dimensional weight is a weight the carrier works out from a box's size, by dividing its cubic measurement by the carrier's published divisor. A parcel carrier bills that figure or the scale weight, whichever is higher. Bulky pet products take up a lot of room for what they weigh, so they often end up billed on size. When that happens on a big order, it is often a sign the shipment should go LTL or FTL instead of parcel.
How do you ship oversize and irregular pet items like cat trees and aquariums without damage?
Each one is packed for its shape, not just its weight. Cat trees and scratching posts go LTL, braced and with their corners protected. Crates and kennels are braced so the frame holds its shape on the way. Pet beds are compressed or packed in a box that fits them. Aquariums ship cushioned, with the glass kept away from anything heavy in the box. Packing for the shape is what gets an oversize item to the carrier ready to survive the trip.
How fast do heavy and bulky pet orders ship?
Orders that arrive before the day's cut-off can be picked and packed the same day. At packing, each order is assigned to parcel, LTL or FTL. Freight is slower than parcel: LTL typically takes a day or two longer, while FTL goes direct. So delivery time depends on which way the order ships, and on the carrier once it has the shipment.
Find out how your heaviest pet products should ship
Show us your heaviest SKUs, how many you sell and where, and we'll work out which orders are better off going parcel, LTL or FTL. The quote is free, and there's nothing to commit to.