My puppy is just over 8 weeks old and I took her to the vet yesterday as she was straining a lot and I found one poo which was mucusy and a bit of blood. The vet checked her over ( it's quite possible shes eaten something down the garden as she's a typical puppy into everything and we have hedgehogs etc wandering through the garden in the evenings) anyway temp was fine so vet gave us some rc sensitive meat to have couple of tablespoons every couple of hours and some promax for 3 days.  It did seem to be getting better but now I'm not sure. Could my couple of tablespoons be too generous? She also eats so fast it's incredible - I assume she's still thinks the rest of the litter may get it but could this have anything to do with the problem and if so can I do anything to help.  Next step with vet if it doesn't clear up is to take a sample in. 

I take it that you have only just got the pup, did the breeder give you some of the food the pup was used to and also a menu, mind you I am a firm believer that you should also bring home with the pup some of the water they are used to or failing that give bottled water and change to your own tap water slowly. Having said that an upset tummy is not that unusually when a pup changes homes.

Yes she gave us some food and she was also on diluted puppy goats milk (vets said to leave that out for now) and I was feeding same food same amount each day.  I do tend to give her filtered water.

And yes we got her Saturday

Then I would not worry too much it often happens after all our household bugs are different to those of the breeder, pups usually right themselves in a few days but always see your vet if you are worried. Will go back and look at your first post as I have a feeling I have forgotten something.

If it were me I would be slowly putting her back on the food the breeder gave you, what was it by the way. Do you know when she was last wormed? I really would not worry too much pups either appear to be starving or they wont eat at all it is all designed to send their owners mad.

Once she is over her tummy upset you can slowly increase the amount of food you are giving.

I always advise my puppy owners to give a teaspoonful of Bio Yoghurt on their meals if they get the runs (or even if they don't ;) )   it really helps keep their tummies normal through the change of home and they love it, it's a regular part of their diet when they are with me :-D    My adult dogs get it regularly too, their favourite seems to be Greek Yoghurt at the mo :)

Personally, I'd not have changed from the food the puppy is used to as long as the pup had normal poos to start with, but vets do seem to like to promote whatever they are selling ;)

Worst thing one of mine ate as a pup was a chicken carcass from the bin, it was riddled with maggots and I had to fight her for it.   It was like a scene from the X-Files    The bin bag was full of maggots too :(     Despite this madam never had any reaction to it, her stomach must be made of cast iron LOL  I had nightmares for weeks

The vet said puppies don't have the good bacteria and that's what the promax was. We back onto fields and she picks up everything from leaves, sticks, stones I even caught her having fun with some ants ( do you know if ant powder would hurt her she could well have sniffed some of That )
Dill & nova - should I not be too concerned about the blood I've seen.  She was wormed regular and I think is due to be wormed again at 10 weeks when she has vacinations

And she was on royal canin dry and vet gave her some tins of royal canin sensitive chicken and rice. 

Insecticide could do a lot more harm than giving her loose poo so do be careful with that.

Food, would start adding one or two pieces of kibble to her tinned food and increase as the days pass.

Don't worry about the blood if it is just streaks that is the way the intestines protect themselves the lining is discarded and new grows to replace, of course, if it is dripping from the pup then you worry.

Nippon Ant Powder contains permethrin according to the website.     Don't know about other Ant Powders - I never found one that worked.

I know that my oldest dog is allergic to permethrin/pyrethrum.   She collapsed soon after being dusted for fleas as a pup.  Luckily I knew the signs and acted immediately, giving her liquid Piriton and then bathing her immediately.   I also gave her honey and water as a boost.   Vet confirmed my diagnosis and actions.

Best way to get rid of ants is to find the nest and pour boiling water on it in the night when activity is lowest.    I found it was the only thing that worked when we had ants getting into everything ;)

As above, I wouldn't worry too much about a few streaks of blood on the stool, it can come from straining through diarrhorea.  Any more would cause concern though ;)

I've noticed she's some times sits down and try's to rub her bottom.

That is because she is passing stools that are somewhat acid, it burns a bit and needs to be rubbed.

If it is improving I would just stop worrying, slowly reintroduce her normal food and continue with the bottled water this this phase has passed - believe me pups that do not get a tummy upset on going to their new homes are in the minority.