A Pregnancy Mystery....That Drives Me Crazy!

This is Cricket on Feb 25th of this year. About a month and a half after I bought her. She is a very lovely, very pretty horse. She has had 11 foals and is 16.5 years old.

She was sent to the stud farm and the first time she was bred she came back into heat so we bred her again. Now we had her checked after the second breeding and the vet said that she was not pregnant. I accepted this as a fact and planned on breeding her for a last time next year before she retires. I did not think much of it after that. However, as I have been watching her over these past few months and also watching Phoenix because she was bred at the same time too, I have noticed Phoenix growing a baby belly (as noted in a post below) and incidently I am noticing that Cricket seems to be gowing one too?!?

This is Cricket a few weeks ago....Look how big her belly is getting. It would not be huge yet, as she would only be about 3.5 months along...but am I wrong? is she not beginning to look pregnant???

This is Cricket last week. She would be almost 4 months along. Her belly is taking on a noticeably round shape to it.....If you look at the first picture of her and look at this one she definitely looks pregnant. The stud owner believes she is indeed pregnant...she is so sure that she entered Cricket into the stud books for this year. I find it hard to decided if she has just gained weight or if she is indeed pregnant. Usually if they are just gaining weight and getting fat they gain it all over, just not in a round belly. And when they do have fat bellies its not ususally so round and low.....
Above is Phoenix and Cricket. Phoenix is 19 days along in her pregnancy. And Cricket has not been bred yet.

This is Phoenix about 125 days into her pregnancy and you can definitely see a baby belly on her. The picture of Cricket would be about 110 post-breeding and does she not look remarkably similar to Phoenix???