The lady who boarded Dobby wanted a bit of his normal food and a favorite toy to hang in his rental cage if we weren't bringing his cage which she knew would help him feel more at home. So good boarders should ask for things like that and if not but they seem otherwise decent either bring his house or bring his favorite toy and food.
When we walked out after getting Dobby in his new house he realized we had left and started Kack KACK Kacking so I said OK, I have to go back in and comfort him. He jumped on my finger through the bars and I told him we weren't going to leave him forever and we'd be back. He calmed down after a bit and I was worried but she said through chat he came out the next morning, jumped on her then right off to the big atom on the ceiling and hung out and surveyed his situation then realized he had all kinds of friends and toys to play with and started exploring the area.
I hope Leto got to do similar and he certainly was happy to see us even though he had a great time, he even almost cuddled up to me and I'm not his chosen one