My cat wont eat for a day now and my dad doesent want to take him to a vet! what am i gonna do?

well last mon. (dec 25) he was acting like his usual self,and he was robust,but the next day,he suddenly didnt wanna eat..he walks very slowly and meows as if in hes pain.and he constantly tries to eliminate even if nothing comes out,this is the 2nd time ive noticed him doing that the 1st one was last month..i... show more well last mon. (dec 25) he was acting like his usual self,and he was robust,but the next day,he suddenly didnt wanna eat..he walks very slowly and meows as if in hes pain.and he constantly tries to eliminate even if nothing comes out,this is the 2nd time ive noticed him doing that the 1st one was last month..i really wanted to save him coz as per my research that syptom is indicative of a severe urinary infection or blockage and it said that it needs to be treated ASAP! my dad wont take him coz to the vet coz its expensive and he doesent like cats,only dogs so he doesent wanna waste money coz he said that it will eventually die anyway even if we take him to the vet , just like our other dogs,and he told me that, "that's life"..heck what if its still curable?this is only the 1st day..and hes only 2 yrs old..if i didnt blow all of my money i would take him to the vet myself..so should i just hope for the best or convince my dad until he gives in?? is there a public hospital for animals?
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