I agree you will probably need more than one gun to effectively do all of the things mentioned.  Shotguns for hunting birds, rifles or pistols/revolvers for euthanising livestock.  You should see what my husband did to my barn killing a bobcat.  The only thing to hand was a 12 gauge, now the tin siding has a huge hole in it.  I like the .22 rifle because it's easy enough for me to handle if needs be, typically he's out and about somewhere when I have an emergency!  I wish there was something the same size that I could use to hunt quail.
	
		
			
		
		
	
				
			 
	 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		