Frog or?

My neighbour has had a frog like yours for several years, here's an article which states that common frogs can be this colour ... www.woodlandtrust.org.uk/.../
If you google there are many images of yellow frogs!

Thank you. It was more the size of it, it looks swollen or is it merely well fed? There are plenty of slugs here

Thank you. Hopefully just a happy, healthy, well fed frog!

Maybe another poster will have different ideas, am no expert!