When i first got Chloe my cockatoo she wouldn't get in a travel cage without being toweled i ended up driving home with her on my lap when i got her. It took her almost a month before she would go in it on her own. The only time she saw a carrier before i got her is when she got sold to a new owner or to get groomed, so she hated them. After she started going in the carrier and was ok staying in it for 10 mins i started taking her to the store with me. It is only 10 min round trip but she loves to go in and get a peanut from the girls that work there. With the vet and grooming trips thrown in every now and then she doesn't mind jumping in it. She always thinks she is going to the store lol. Just find something your bird likes to do as a reward for going in the travel cage and before you know it every time they see it they are ready to go.