My younger golden gets the bloodshot eyes when he's excited, especially training class. I ran him to the vet, paid $50 for them to pretty much tell me that was his way of basically blushing, his ears get red too.
Misty- Samoyed Mix
Tannor- Golden Retriever CGC
Robyn- German Shepherd CGC, TC
Midnite-German Shepherd CGC, TC
Brennan- Golden Retriever CGC