Crapshoot, I've used Dykem before and just plane red plastic. No matter what I use I always see gold or like you said a yellowish color on cats. I see a bluish or whitish color on coyotes. To be honest, I don't think it's the animals eyes that make the difference. Randy see's red all the time and Randys not alone, others also see red. We all use the same color lights, so that makes me think it's a human thing. What are your thoughts on this subject, I find it interesting.