HollowOfWisps
Previously AstroDuck
The wheezing is most likely some minor internal damage from falling out of the truck. I rescued a kitten and a dog (two different occasions) that were just thrown out of car. Both had a wheeze to their breathing for months afterward and the vets confirmed there was some minor internal damage to their airways. They said that it was caused by the blunt impact from being thrown out of a moving car and landing on the road. Eventually both of their wheezing resolved.