He's having problems with his collapsed trechea. When we were at the vet's office the last time for a follow-up, he said that Prince may have flare ups from time to time and to give him his Aminophylline as perscribed. I gave him a 1/4 tablet at 6 this morning; he's not wheezing now, but is very sleepy...the medicine is kicking in. I'm watching him and have his doctor on notice.