Bulldogs World

Hi everybody, so our little guy is 7 months now and for the last 3 weeks or so i have noticed what I think are seasonal allergy symptoms. His eyes look a little red, his nose runs clear liquid more so after a walk or when he has been outside for a while, he sneezes when he sniffs the grass and sounds rattley or raspy after walk but all of these symptoms fade if he is inside for a long period of time. I would preffer to treat him homeopathically for allergies especially something for his eyes and nose, but not quite sure where to start. I have taken him to the vet but they offer a steriod eye drop or suggest benedryl which i am not 100% opposed to just scared I might give him to much and the benedryl I have at home says(acetaminophen 325mg,diphenhydramine HCI 12.5mg,phenylephrine HCI 5mg).. What exact form of bendryl would I use? Again, I think homeopathic help would give him possible relief and may be less agressive than benedryl.. Any suggestions on how to help him feel better?

Thanks so much