When I could not walk I found I spent quite a bit of time shooting bird and my dogs though windows. You will probably find there is only an hour, or possibly less, a day when you can get clean shots depending on where the light is coming from. If the light (even when the sun is not shining) is coming into the room you will get reflections as will you if there are any internal lights on.
For instance, at this time of my I can only shoot though the window from around 8.10 to 8.30 am IF the sun is shining, otherwise it is too dark or there are too many reflections. In mid-summer the sweet time is around 11 am.