I'm sorry to hear you don't like the asset you bought.
First of all I agree with your remark about the 5+ seconds of dead air: I guess I uploaded the wrong versions: I'll fix this through an update.
I don't really know what you mean with 'you would think there would be many different sounds for different things'...
I don't have a dog so it's not my dog you're hearing
But indeed it's mainly about animal recordings and adding effects to it, but not limited to only reverb and pitch changing.
To make a long story short: please let me know if you would like to apply for a refund. I prefer satisfied customers that might return and maybe buy other assets above a one-time-only sale.
I could also send you a voucher to download one of my other assets... Hope you like them better...
Please let me know which option you prefer.