@WitchyWriter There is a site function for this. Go to the demo underneath the 3 bar menu, put in your wolves' IDs into the entry bar, then hit the "save current" button below that to save a copy of each wolf, and hit the "preview" button to see bloodline compatibility and potential colorings.
However, many people (mostly those on non-apple devices) have still been having issues where it doesn't accurately tell you if they're related or not. As someone on iphone, I don't have this problem and my puppy predictor works accurately. This does NOT mean it will work for you, too. But the option is there.
I want to point out that if you save a wolf as a custom, through changing a color or gender somewhere, it will not work. Customs cannot be previewed, you can only preview existing wolves by their ID.
I've done the painstaking labor of mapping out bloodlines. It's really difficult and I try to avoid it if I can. If you'd like, I can check two wolves' compatibility for you, since the puppy predictor is accurate on my device. If not, no worries.