Does anyone know what large white 'Love heart' like tablets there are?

[BelAnna]

I'm in a panic. Just after my brother put our dog in the car on the road near our house I saw a very large white tablet like thing with a heart on it. My brother thinks it's a love heart sweet but there are no words on it and there is no pink outline to the heart on the pill/sweet. 

When I was walking back from my appointment earlier I saw another of these things and I think it had a line down it, suggesting it's a tablet/drug of some sort. It's very large, the size of a 'Love heart' sweet. 

What do you think this is? I'm worried that there might have been another one near our car and our dog could have got it. 

Is this some form of legal high? 

[PolarBear]

Anna, take a breath and look at what's going on. Once again your mind is running away on its own. Another day, another supposed danger to your dog. 

What do you suppose is going on in your head?