> struggling to keep condition on a couple of them.
Is 'condition' a euphemism for weight or do you also have skin and coat worries too? What happens if you simply increase their portion sizes?
It might be that their current food doesn't suit them BUT some dogs do run on the lean side. Have you always had trouble with this 'couple of dogs' or is this a relatively recent problem? How old are they? If you've eliminated all other health issues then it could be time to change but I must admit that changing food would be my last resort, certainly if they've previously been fine on their existing food
I hadn't heard of Happy Dog til you mentioned it - how does it compare with your current ingredients list?