In general, I like her. Nice and sturdy looking, so on. Her neck seems a little shortish, though... and it's certainly very thick (whether or not that's a "fault" I'm not sure). If you look at my avvie, you may see what I mean though. My Welsh Cob's neck starts off relatively thick and muscled, but it tapers a little more towards her head and her throatlatch is more refined.
She looks like she may be an itty bit pudgy? I can empathize with pudgy. My pony is pudgy in the spring/summer no matter what you do.
I think you took a picture OF a picture on your floor? I can see the angle is off (Because the person in the picture has larger feet than her head) so its hard to judge the ponies angles and this makes her neck look shorter :)
All in all I think she is a gorgeous example of a Fell pony, I've always loved them. She also does NOT look fat to me, she looks like she is suppose to and I hope she hasn't lost too much :)
Haha yes it is a picture of a picture on the floor :L and I have to say my feet are definitely not bigger than my head haha. Thank you :) no she is not short infront, I have to told she has a good length of rien? X
Overall she's very nice! Its hard to critique her though, because it looks like the picture is curled a bit to when you the the picture of a picture, lol. If you could just get another picture on her in person then it would be way easier to tell!