Dogecoin and Shiba Inu experienced a decline in value after Ethereum co-founder Vitalik Buterin generously donated over $500,000 worth of memecoins to an animal charity. This act of kindness by Buterin caused a decrease in the prices of both Dogecoin and Shiba Inu. The donation was made to support the welfare of animals and was well-received by the community. Despite the drop in value of these memecoins, the gesture was seen as a positive contribution towards a good cause. Investors and supporters of these cryptocurrencies will be keeping a close eye on their future performance in the market.