Improve jump, decrease herd radius

init.lua

@@ -161,7 +161,7 @@ function creatures.jump(self, pos, jump_y, timer)
 				def2 = minetest.registered_items[n2.name]
 			end
 			if def and def.walkable and def2 and not def2.walkable and not def.groups.fences and n.name ~= "default:fence_wood" then-- 
-				self.object:setvelocity({x=self.object:getvelocity().x,y=jump_y,z=self.object:getvelocity().z})
+				self.object:setvelocity({x=self.object:getvelocity().x*2.2,y=jump_y,z=self.object:getvelocity().z*2.2})
 			end
 		end
 	end

sheep.lua

@@ -214,7 +214,7 @@ SHEEP_DEF.on_step = function(self, dtime)
 
 	-- die if old and alone
 	if self.lifetime > s_life_max then
-		if creatures.find_mates(current_pos, "sheep", 18) then
+		if creatures.find_mates(current_pos, "sheep", 12) then
 			self.lifetime = 0
 		else
 			self.object:set_hp(0)
@@ -362,7 +362,7 @@ SHEEP_DEF.on_step = function(self, dtime)
 			self.npc_anim = anim
 		end
 		--jump
-		creatures.jump(self, current_pos, 6.85, 0.2)
+		creatures.jump(self, current_pos, 7.7, 0.2)
 	end
 
 	-- EATING

zombie.lua

@@ -327,7 +327,7 @@ ZOMBIE_DEF.on_step = function(self, dtime)
 		--jump
 		local p = current_pos
 		p.y = p.y-0.5
-		creatures.jump(self, p, 7, 0.25)
+		creatures.jump(self, p, 7.3, 0.25)
 
 		if self.attacker ~= "" and minetest.setting_getbool("enable_damage") then
 			local s = current_pos