Don't know how old Rajko is but when my gsdx was about 7 months old, I spotted a small amount of blood in the stools. Took the dog to the vet and his anal glands were so impacted and abscessed it took the vet going in three times to get everything out and three rounds of antibiotics. He showed absolutely no pain not did he scoot any. He has to have his glands expressed at least once a month.
Hope it's nothing serious for Rajko.
Hope it's nothing serious for Rajko.