The bulges are very evident in the pics and I think it's a great idea to email them to the clinic and then call and leave a message on their machine asking the receptionist to check the email and pass it along to the vet. I sent videos of my cat to the vet over the last year and it helped the vet see what he was like at home because he was worse when he was relaxed.

It almost seems like it's air/gas?? Maybe he is having an issue with his lungs or a reaction to a food? It is really interesting that it is on both sides and relatively equal as well. Xrays should show something. Prayers for Taz and hoping this mystery is solved soon. I'm sure glad you got the pics because I'm sure it was frustrating when you saw the lumps and then they disappeared. Now you have proof!