Glad to hear he is off poultry and that you are wiping his paws, that should be helping hopefully.
For the eye drops, use Eye Stream which you can get from most pharmacies or some online places sell it and it’s fairly cheap and lasts a long time. I use it daily for Rusty and it’s completely safe for dogs(both the regular vet and the vet dermatologist told me to use it to get rid of allergy irritations from his eyes) and it really does help. 2 or 3 drops per eye.
How long has he been on these protein options without poultry?? All those proteins you said he is on are great for allergies but it can take up to 12 weeks to actually get rid of the allergy from his system(for example poultry if he ate it in the last 1 month it can take another 8 weeks to be fully out of his system). If he is allergic to grass I definitely recommend not letting him eat the grass(some dogs eat it because they like the taste not always due to stomach upset). If he is eating grass and is allergic to grass that can also cause the red spots on his ear due to allergy reactions to grass.
Have you tried the Thrive Herring oil for the inflammation? Or any other allergy supplement such as Bovine colostrum??
Rusty gets those red spots on his ear(he actually had 1 spot on his ear yesterday because of allergy season starting).
For those red spots on his ear, I use a antibacterial wipes to clean those spots, as long as they stay clean they should go away once his allergies are back under control.
Keep us updated!