The major part of imported dairy products (milk, cottage cheese, sour cream) comes from Belorussia (the closest trade partner and ally of Russia) and which is considered by the EU/US as being even more "evil" than Russia. I think they are more than happy with trade sanctions against Russia and by Russia...
Hmm... then this might be a good thing. Rather than importing cheese, fruits and vegetables from the pro-NATO states such as Lithuania and Poland, Russia should source them more from its allies (such as Belarus, Serbia, Argentina, Brazil.etc). Even if this measure results in a small spike in inflation, in the long term it will prove beneficial to Russia.