Is this crate strong enough for a dog that pushes at the door?

The welded steel frame is stiffer than most folding wire crates, so it holds its shape under a dog leaning on the door. Check the latch and door play on arrival, since that is where any crate is weakest.

Can I leave it outside?

It is sold for indoor and outdoor use, but the steel will rust over time in rain or damp. Keep it under cover and dry it after wet weather.

Does it come with a floor pan or bed?

The crate is the metal frame; a tray or bed is not guaranteed in the box. Plan on adding a bed or mat, especially for older dogs.

Can I fold it for travel?

No. It is a rigid welded crate, so it stays assembled. For car trips or moving between rooms, a folding wire or soft crate is easier.

Measure your dog standing and lying down, then compare with the crate's interior dimensions. The listed width and height are small, so confirm the full size before buying for anything larger than a small dog.