Putting it up because the law bans selling it at a lower price is an artificial reason that distorts the market. Putting a price up (if you can) because it is required to stay in business is not.
But the effect of each is the same. An external event - say a world shortage in the supply of chicken, would have the same impact as a government making chicken harder to get. The only difference is that you are labelling one as 'artificial'. Can you explain how the artificiality of it, rather than the size, or economic impact, makes such a difference?
If there is a supply shock (let's say a fire destroys a local chicken farm) the price goes up from $3 to $5. This is because the market is saying "send us more chickens". The quantity demanded outstrips the quantity supplied at the previous price. The price goes up and maybe it becomes economic to start trucking in chickens from miles around. The price going up to $5 allows people who have demand for chicken at $4 to have their needs met by tapping into higher cost sources of supply. The higher price is signal that allows producers of chickens to take action to meet more human needs. On the other side the higher price tells people who are only marginally into chicken and only willing to pay $3 for it to buy mutton or potatoes or whatever else instead. More supply is induced into the market, and the limited supply of chicken flows to those who value it most. A reasonable allocation of resources to needs.
Now if the local farm does not burn down but the government comes into a market where chickens are selling for $3 and decrees "thou shalt not sell a chicken for less than $5" we have a variety of disfunctions occur. First, everyone who was happier buying chicken at $3 or $4 but not willing to pay $5 now has less of their needs met. They are buying mutton or potatoes or whatever because the government is barring a transaction between a willing buyer and a willing seller. The chicken farmer would be delighted to sell chickens to these people but he is banned from doing so by law so he produces fewer chickens than he otherwise would. Maybe he's selling enough chickens at $5 that he's raking in more dough overall and he figures his best bet is to spend some of that gain electing politicians who will vote to raise chicken prices even more. He's riding a government cartel and he likes it. Maybe he makes some of this up by selling chickens on the black market and bribing local officials to look the other way. Maybe as the black market for chicken heats up rogue chicken farmers pop up operating at the fringes of society to meet the clamoring demand for chicken at $3 and $4. At least until some Maduro-esque politician sends out the troops to crack down on the illegal and unpatriotic chicken selling. So, this results in fewer consumer needs being met, underutilization of chicken farm resources, black markets and corruption.
Sounds a bit like the US sugar market.
