Would it be possible for me to desensitize Felix to outside? I just came back from the vet and all the outside noises scare him. Especially people on the bus. If I bought him a stroller (for animals) and walked him around outside more, would he become more comfortable or would that just stress him out? He does enjoy going out in the backyard in the summer and watching the birds but that's about as far as I can go with him.