My puppy has traces of blood in his pooh
My new puppy (patterdoodle) x breed (patterdale terrier and a poodle) has been home now for 6 days and he is 11 weeks old tomorrow. He has been on a diet of dried food - and only ate one bowl of it since coming home, he prefers plain boiled rice mixed with tuna and my husband has gone to buy him science plan today to try him on. His stools over the last 2 days have become runny and a jelly like substance in some of them. He also has traces of light red blood. He goes to the toilet out in our back yard about every hour. He is acting normal in every other way, pinching my slippers and running round chasing the kids etc, no lethargy signs and no vomiting and he is booked in for his first vaccination on Monday.
History
We bought him off a farm that was home to around 10 other dogs, he was kept with his sisters in another part of the farm but when we went to view him he was brought into the farmhouse kitchen with them and his owner said he was allowed in there on a night with his mother and father to play for an hour or so. He said all 3 pups had just been wormed so there may be some diarrhoea. Unfortunately I omitted to ask which brand of tablet had been used.
Do I need to be concerned and get him to vet now (saturday)?