I might suggest that the dog poster really doesn't need the 'Protection' label. Some people might miss it if they just glance over, but I think it's better without the blatantly obvious.
+1 in all regards! Propaganda, or influential posters of this sort, work best without overtly stating what they're trying to convey. If you make the suggestion, people will take the suggestion and come to their own conclusion - a conclusion which, since
they made it, they are more likely to retain.
That is the force which makes propaganda effective.
Take, for instance, this popular propaganda poster from WWII:
It says, "we can do it" referring explicitly to the war effort, but what it's really making the point of is the strength of a woman, as it was a bit of a hot topic - suffrage for women had only been around since 1920, and "female liberation" in the US was a bit of a big subject for many housewives. So, in effect, the poster is attempting to harness the social desire to the end of a different yet compatible goal, suggesting that by doing one thing the other will be realized.
And then, of course, there is negative propaganda, which feeds off different (negative) social and emotional conditions. IMO, most of Oleg's work is pretty even handed, sharing in both positive and negative imagry, strongness and weakness, in the same poster. Very well done, I think.
