I'll just respond here.
The head is a little too short, it should be longer from left to right at that angle as well as stick a lot further out. All animals (Edit: ok not all, but almost all) have an arc/hump on their back where the shoulders end. Even a human in the same position will create a hump in the back because of how the shoulders work. Also, the front legs flow FROM this hump, otherwise it won't look natural. In-fact, there are a lot of similarities in the human body and animal bodies, and once you realize this similarity in structure, they become easier to draw.
You'd pretty much just have to draw it again and keep things like these in mind when you use your reference. Also try to draw it in the same shaped area so you are less likely to mess up proportions. Start with the most basic shape you can think of and work from that. Match shapes until it looks right.
If you look at this picture you can see what I said was true.
Picture was taken from a random Google search. It's only here to show Orange Wolf what a tiger looks like.
