Are these walking shoes slip on?

Yes, they are slip on shoes, very easy to put on and take off

My feet sweat very easily, are these shoes breathable?

The upper of these slip on shoes is very breathable and the insole is very absorbent, highly recommended!

I want a pair of shoes for walking. I have to take my big dog for a walk twice a day

I think these walking shoes are the best choice for you, they have good cushioning and shock absorption in the sole, no matter walking or standing for a long time, you won't feel foot pain