Your cat has more experience than me. I’ve detected only in my yard and found several 1940s quarters deeper than I could imagine. I went on vacation last week and only brought a sand scoop because it’s an island beach right? There was nothing here before 1982 when the resort was built. I started it on and got several low number groans. I skipped these. I moved up the beach away from the water. I was almost to the lawn 10 yards and in 10 15 minutes found at least 10 “dings”. The number read 91 on these at 10”+I tried digging with a scoop but the palm roots they planted in 1982 I couldn’t get thru. I had a big dive knife and it still was no help. My noob question is what kind of metal reads in the 90s? It was strong sure and clear at 10+”. It was loud and solid for each of them. Thanks. Yes if this is a stupid question, yes I’m that much of a noob thanks.