Carry-on cats
 

The Canadian Transport Agency recently ruled that Air Canada, Jazz, and West Jet need to amend their policies regarding carry-on cats, who currently qualify as carry-on baggage, as they may cause distress to allergic passengers,. according to Canada's Financial Post. Smaller aircraft especially may not have adequate filtering of air systems.....

What about hamsters, gerbils & such?

That question would be better answered in the Richard Gere forum.