Cooper had a rough day. First, he was a little out of sorts because he has a little runny nose and probably some teething. He's got a major rash on his butt and inside of his legs.
Next, he bashed his lip, gum, teeth area on the coffee table and started to bleed up where your lips meet your gums. ouch!
Then, he was playing with Cash and they were chasing each other. Cash ran through the door and Cooper followed but wasn't fast enough and the door slammed on his finger and cut the skin pretty badly - but not deeply. he actually got a band-aid for his troubles.

i bet he was happy to get in his bed.