Help with canine disease, is it parvo?

my 8 week old Rott is diagonised with parvo and is taken care by my hubby. So I isolated my 18 week old dobe. Locked him in my bedroom with my pug *****. he shouted, I went in and saw him 1 hour once. today in the afternoon, I noticed some blood in his semi solid stool and rise in temp. the blood is reddish not bright red or tarry, it is like around the stool. othewise he is normal with good intake and active. But wants to lie in my lap whenever i go and see him. Is it parvo. Just waiting for my hubby to return so that v could take him to the vet.