I will be taking my ~15lb Jack Russell/Toy Poodle mix with me to Canada in a few weeks. (Mid-June sometime, not 100% on the dates yet.) I've read AA's requirements for taking onboard lapdogs, and know that you must have the rabies certificate and such, but I'm looking for any anecdotes having to do with carrying pets through security, on board the aircraft, etc.

I'll be taking her in a squishy carry-on bag and we'll be riding up front, where I (think?) there's a bit more room under the seats for her.