I first visited Cuba around the year 2003. I spent one month studying at the University of La Habana and had some time to visit Trinidad and Pinar.
I was a vegetarian back then, so finding something to eat was not a problem, even if you had to buy cheese and eggs at the black market. Meat was a luxury item, so it was not easy to find it in street food stalls.
What really shocked me was the condition of stray animals: everywhere I went I saw miserable cats and dogs, ill with skin diseases , so thin you could see their ribs, and many of them had their ears cut, I really don't know why.
People of course got shocked and angry when I asked for meat for the animals, in a time when many humans didn't have enough to eat.
I left the island in deep sorrow because I couldn't do anything for the animals, and nobody was going to do anything soon.

In La Habana you won't find huge supermarkets like the ones we are used to, but local markets are scattered everywhere and are just perfect if you are looking for mango, aguacate, platano, guayaba, malanga....

These are the best markets in La Habana (for me)...