Stomach ulcer - How to diagnose?

[Stator]

Lilly is 13 and having poo problems. She has poo problems fairly often, but usually resolves itself.
She is eating very well but she lies down a lot and looks uncomfortable. When she is moving around and eating she looks in perfect condition.

She is on metacam and zantac.

I'm worried that her discomfort could be a symptom of a stomach ulcer, but it could also be lower intestine pain related to her poo problems.

I reduced her metacam to a very small dose incase she doe have one, but that could be causing her more pain

Is there any way at all to tell if she has a stomach ulcer?

Her diet at the moment is mostly grass, hay, carrot/blackberry/rose leaves, cabbage, parsley,dill, mint

 

[Jack's-Jane]

Lilly is 13 and having poo problems. She has poo problems fairly often, but usually resolves itself.
She is eating very well but she lies down a lot and looks uncomfortable. When she is moving around and eating she looks in perfect condition.

She is on metacam and zantac.

I'm worried that her discomfort could be a symptom of a stomach ulcer, but it could also be lower intestine pain related to her poo problems.

I reduced her metacam to a very small dose incase she doe have one, but that could be causing her more pain

Is there any way at all to tell if she has a stomach ulcer?

Her diet at the moment is mostly grass, hay, carrot/blackberry/rose leaves, cabbage, parsley,dill, mint

Only an endoscopy/gastroscopy would confirm a gastric ulcer x

 

[Stator]

Thanks for the info.
I don't think it's an ulcer any more as she is eating so well and the problems aren't limited to before and after eating, it is all the time.