I had recently changed our dogs food, but it hasn't gone down too well, or at least I'm putting it down to the food change. The dogs both started pooing in the night :-(.  So wanted to put them back onto their old food, did a search on the internet for Eukanuba offers and ordered some.  Unfortunately I now realise it was cheaper than normal because I have joined a Puppy Club!  So I have a 15kg bag of Puppy/Junior instead of adult (my dogs are 2 and 7), also have some adult Eukanuba.  It takes the dogs about a month to get through a 15kg bag.  Any food experts out there?  I'm going to start them back on the Adult Eukanuba today, but once they are back onto it OK, would it be OK to just feed them the puppy food?  Or mix it in with their normal food over a longer period?  My mistake so I can't send it back.
If it helps Nutritional Analysis is
Puppy- Protein 26%, fats 21%, fibre 2.5%, kcal 4138
Adult - Protein 23%, fats 13%, fibre 3%, kcal 3919
Hope someone can help! Thanks

Well my dogs are on adult Arden Grange (including my 11 year old) which is 25% protein so I would mix your two bags and it will be about the same.

I've always fed my dogs puppy food,from puppies all the way through to old age.The kibbles are smaller,and the protein and fat contents are usually higher,which is what i want.
You shouldn't have a problem feeding the puppy food for a month,or as already suggested,just mix the 2.The food my dogs are currently on has around 40% protein and 22% fat,plus i mix in fresh meat.

>I've always fed my dogs puppy food,from puppies all the way through to old age.

Is that recommended for border terriers? I've found through work that high-protein diets seem to make them very itchy. Once they're on a lower protein food they improve dramatically.

Thanks for the advice, I'll probably mix it in after a few weeks. 
Hopefully the messing in the night will stop now aswell, or I'll be back on looking for answers to, why two dogs would suddenly start to poo in the night, neither of them having accidents since they were 3 months old!

I've found through work that high-protein diets seem to make them very itchy   JG just out of interest what sort of senarios have you seen this in?

I just wonder what sort of senario a vet/Vet assistant would see a dog be moved from a low to a higher protein  or vice versu with no other contributoryfactors.   

If a dog is moved from a lower protien food to higher protien food it is rare it has all the same ingredients bar the protein so for me that would make massive differences in influencive factors.  The protein along could not be the single contributor.

If protein is reduced in a food it is replaced with something generally rice/wheat/grain , maize whatever way you look at it.   

I would be suprised if true protein being increased could ever make a dog more itchy UNLESS it was allergic to that actual protein in the food and again there are various proteins.

In my experience it is generally the " other" stuff if dog food that causes the itch.  along with too low fat, additives etc

>JG just out of interest what sort of senarios have you seen this in?

Where clients have changed their dogs' food to same-brand but lower-protein version, and the dogs condition has noticeably improved. It seems that Border terriers are a breed that copes better on 'rougher' (for want of a better term) rations.

JG no itchy dogs here :) I've used this same protocol with other breeds of dogs with no problems either.

I also think it's important to know the source of the protein.There are a few high protein foods,but that protein is derived from maize(eg royal canin).I would imagine these types of products would give some dogs the itchies.But when the high protein levels are from plain,pure meat then i doubt many dogs would have a problem.

>In my experience it is generally the " other" stuff if dog food that causes the itch.  along with too low fat, additives etc

Couldn't agree more.