From what I know (which isn't a great deal!) Dogs eat their poo when there is something lacking in their diet. That might explain why they eat it after they've had Pal....coz apparently it is mainly made up of water.

I'd go somewhere where they have a large range of dry foods (if that is what you feed your pooch) and see all the ingredients in them. If you change the biscuits they eat, just watch you don't do it too suddenly coz it might upset their bellies, but it might make a difference.

I used to feed my pooch advance for large breeds and those biscuits are huge, so he'd have to chew them up too, but he never has eaten his own poop.

You might want to throw in a bone occasionally for them too.

Hope they stop soon....it's pretty rank!