You always need to include nice clear photos of both sides. 1861 could be real as both Philly and New Orleans were minted in large numbers. The San Fran is not super rare either. Book says weight should be 12.44, which is close, your scale may not be precise, although if circulated I would expect the weight to be slightly lower (12.3) rather than higher. Again without photos there's no way to tell and even with them you can only make an educated guess. If this is something you got for a very small amount of money, then the fake factor rises in comparison.
I corrected my post as no Denvers were made that year. Feeling doesn't equal facts when it comes to a coins authenticity. Happy for the dog, but you'll have to upload photos. Preferably not from a phone.
Looks like a silver-plated replica, with the silver plating worn off in spots. The lettering doesn't look especially like the real thing. https://coinquest.com/cgi-bin/cq/coins.pl?coin=1114 This looks like a copy that's worth less than the ones on the linked page.
Yes Confederate it's going to be fake. There's a very small handful of real ones, and this isn't it. It's a copy. There are probably some good articles here, or online about the Confederate half dollar. Use the search function here, or Google.
